SOLUTION: 642*(4.0*10to the negative 5 power ) express with appropriate significant figures .

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Question 777394: 642*(4.0*10to the negative 5 power ) express with appropriate significant figures .
Answer by CubeyThePenguin(3113) About Me  (Show Source):
You can put this solution on YOUR website!
When multiplying, the result is only as accurate as the term with the least amount of significant figures.

642 => 3 sig figs
4 => 1 sig fig
10^(-5) => 5 sig figs

642 * 4 * 10^(-5) = 0.02568 = 0.03

Here is some more information about significant figures:

https://www.nku.edu/~intsci/sci110/worksheets/rules_for_significant_figures.html